| Revision as of 16:40, 4 December 2008 editWoudloper (talk | contribs)Extended confirmed users, Pending changes reviewers, Rollbackers2,915 edits there is no difference between 'minor' and 'major' periods; chron is normally a subdivision of an age← Previous edit | Revision as of 06:11, 5 February 2009 edit undoRockMFR (talk | contribs)Extended confirmed users28,801 edits bigger fontNext edit → | ||
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| |colspan=3|<span style="float:right;"><span class="plainlinksneverexpand">  </span></span><center><big>''']'''</big><ref>{{cite web|url=http://www.stratigraphy.org/chus.pdf|accessdate=2008-06-17|title=International Stratigraphic Chart|author=]}}</ref></center> | |colspan=3|<span style="float:right;"><span class="plainlinksneverexpand">  </span></span><center><big>''']'''</big><ref>{{cite web|url=http://www.stratigraphy.org/chus.pdf|accessdate=2008-06-17|title=International Stratigraphic Chart|author=]}}</ref></center> | ||
Revision as of 06:11, 5 February 2009
| e h | ||
| Segments of rock (strata) in chronostratigraphy | Periods of time in geochronology | Notes |
|---|---|---|
| 4 total, half a billion years or more | ||
| 12 total, several hundred million years | ||
| tens of millions of years | ||
| millions of years | ||
| smaller than an age/stage, not used by the ICS timescale | ||
- International Commission on Stratigraphy. "International Stratigraphic Chart" (PDF). Retrieved 2008-06-17.